MI 611-211 Instruction October 2005 870ITPH Intelligent Electrochemical Transmitter for pH, ORP, and Ion Selective Electrode Measurements
MI 611-211 – October 2005
Contents Figures..................................................................................................................................... v Tables..................................................................................................................................... vi 1. Introduction ...................................................................................................................... Quick Start ......................................................................
MI 611-211 – October 2005 iv Contents
Figures 1 2 3 4 5 6 7 8 9 Wiring ......................................................................................................................... Supply Power vs. Load ................................................................................................. Data Label .................................................................................................................... Panel Mounting .............................................................................................
Tables 1 2 3 4 5 6 7 8 9 10 11 12 vi Product Safety Specifications ........................................................................................ Recommended Conduit and Fittings ........................................................................... Indicators and Controls ................................................................................................ Diagnostic Error Messages ...........................................................................................
1. Introduction The 870ITPH Intelligent Transmitter converts pH, ORP, or Ion Selective Electrode measurements to a 4 to 20 mA and/or digital output signal depending on the model selected and the configuration implemented. The analog only output version (Model 870ITPH-A) supports configuration, calibration, and diagnostic troubleshooting locally at the front panel.
5 5A 6 7 8 G NOT USED DIAGNOSTIC REFERENCE ELECTRODE REF. ELEC. SCREEN (SHLD) SOLUTION EARTH (GROUND) MEAS. SCREEN (SHIELD) 2 2A 3 3A 4 SENSOR POWER, + 1 SENSOR POWER, - 4 - 20 mA CAL + RTD 3-WIRE RTD MEASUREMENT RTD RETURN – MEASUREMENT ELECTRODE 1. Introduction CONFIGURATOR PC-BASED MI 611-211 – October 2005 INPUT POWER CASE EARTH (GROUND) Figure 1. Wiring Factory Default Passcode The factory default passcode for both minor and major passcodes is 0800.
1. Introduction MI 611-211 – October 2005 configuration. You can view one of the other two selections by using the Up and Down arrow keys. The display will return to the configured selection when the configured TIMEOUT time is reached. Configuration errors and transmitter and sensor errors are also shown on your display while in the Measurement mode.
MI 611-211 – October 2005 1. Introduction Specifications Sensors: Virtually any glass or antimony pH, ISE, or noble metal ORP sensor including the following: PH10 DolpHin™ Series pH Sensor ORP10 DolpHin™ Series ORP Sensor 871A pH/ORP Sensor (see Note) 871PH pH/ORP/ISE Sensor (see Note) EP459A Fluoride Sensor EP460 pH/ORP Sensor EP462 pH Sensor EP466 pH Sensor NOTE 871A-2, 871PH-1, and 871PH-2 Sensors, although compatible with 870ITPH Transmitters, do not supply full sensor diagnostic capability.
1. Introduction MI 611-211 – October 2005 1450 1400 TYPICAL SUPPLY VOLTAGE AND LOAD LIMITS 1400 OUTPUT LOAD, Ω 1300 1200 V dc Load (ohms) 1100 24 30 32 250 and 565 250 and 860 250 and 960 1000 900 NOTE The transmitter will function with an output load less than 250 ohms provided that a PC-based configurator is not connected to it. Connecting a PC-based configurator while operating in this area may cause disturbances and/or communication problems.
MI 611-211 – October 2005 1. Introduction RoHS/WEEE Compliance Statement This product is exempt from the European Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS), as provided by Article 2 of that Directive in conjunction with the Product Category #9: “Monitoring and Control Instruments.” This product complies with the European Directive 2002/96/EC on Waste Electrical and Electronic Equipment (WEEE) and is marked accordingly.
2. Installation Unpacking 1. Remove the transmitter from the shipping container and check for visible damage. 2. Save the container until you determine that no shipping damage has occurred. a. If no damage is observed, proceed to the Mounting procedure. b. If transmitter has been damaged, notify the carrier immediately and request an inspection report. Obtain a signed copy of the report from the carrier and contact the Customer Satisfaction Center at 1-866-746-6477 in the U.S.A.
MI 611-211 – October 2005 2. Installation LOCKWASHER TRANSMITTER BRACKET SURFACE CAP SCREW WASHER Figure 5. Surface Mounting Pipe Mounting Pipe mounting of the transmitter is shown in Figure 6. Securely fasten mounting bracket to a DN50 or 2-in pipe as shown. For space requirements and other dimensional data, see DP 611-163. BRACKET LOCKWASHER PIPE WASHER CAP SCREW TRANSMITTER NUT U-BOLT LOCKWASHER Figure 6. Pipe Mounting Wiring Your 870IT is a 2-wire transmitter.
2. Installation MI 611-211 – October 2005 ! WARNING Wiring installation must comply with any existing local regulations. ! WARNING A safety agency certified energy barrier must be used with this apparatus to meet agency certification requirements. See MI 611-206 (FM/CSA) or MI 611-208 (ATEX) for details. ! CAUTION 1. Failure to adequately seal open ports or secure the cover will jeopardize NEMA 4X, CSA Enclosure 4X, or IEC IP65 and will void instrument warranty. 2.
MI 611-211 – October 2005 2. Installation must be wired to a metallic material in contact with the process solution. If not, jumper terminals 4 and 5. 6. If you are not wiring a temperature measuring device, short terminals 1, 2, and 2A to minimize noise. POWER RS-232 IFD MODEM SUPPLY (24 V dc) + – IBM COMPATIBLE OPTIONAL PC PRINTER CABLE TRANSMITTER 2 2A 3 3A 4 CASE EARTH (GROUND) Figure 7. Wiring 10 7 8 G NOT USED SENSOR POWER, + REFERENCE ELECTRODE INPUT POWER NOTES: 1.
3. Operation Controls and Indicators Operator controls and indicators are located on the front panel. Figure 8 shows the panel arrangement. Table 3 identifies the function of each element. PRIMARY DISPLAY SECONDARY DISPLAY WHEN CAL, CONFIG, STATUS, OR DIAG 20-SEGMENT BARGRAPH FOR OUTPUT % OF SPAN WHEN IN MEASURE MODE KEY IS PRESSED, TWO SEGMENTS ONLY APPEAR UNDER THE APPLICABLE LEGEND. 7.00 pH 25.
MI 611-211 – October 2005 3. Operation Table 3. Indicators and Controls (Continued) Control/Indicator Function STATUS Key Places transmitter in Status mode. This enables you to view the measurement and system parameters and thus assess the performance of the loop. DIAGnostics Key Places transmitter in Diagnostic mode. This enables you to further identify specific errors and possible solutions to an error flagged in measurement mode.
3. Operation MI 611-211 – October 2005 Passcode Access Two levels of passcode protection are available. The Minor level permits access to Calibration and Output Hold. The Major level permits changing parameters in Configuration as well as access to Calibration and Output Hold. Both are 4-digit passcodes. The passcodes may or may not be the same. They are set as part of configuring the instrument.
MI 611-211 – October 2005 CONFIG TEMP 3. Operation TEMP UNITS UNITS CELSIUS UNITS FAHREN TEMP MODE TEMP TYPE MODE AUTO DEFAULT MODE MANUAL MANUAL TYPE RTD RTD 2 WIRE 2 WIRE 100 OHM 2 WIRE 1000 OHM RTD 3 WIRE 3 WIRE 100 OHM 3 WIRE 1000 OHM TYPE BALCO Figure 9. Example of Structure Diagram Measure Measure is the normal operating mode of your transmitter. The pH, ORP, or ISE measurement is shown on the top line of the display.
3. Operation MI 611-211 – October 2005 Diagnostics (Refer to “Structure Diagram 11” on page 48.) The Diagnostics mode enables you to perform checks on your system at any point in time. While you are in the Diagnostic mode, two segments of the bar graph will appear under the legend DIAG at the top of the front panel. To enter the Diagnostics mode, press the DIAG key on the front panel. If there are no errors, your display will read DIAGS OK.
MI 611-211 – October 2005 3. Operation Table 4.
3. Operation MI 611-211 – October 2005 Table 5. Status Parameters (Continued) Parameter TAG NUM TAG NAME LOCATION SONUMBER MS CODE S/W VER DEV NAME DEV TYPE Description Tag number Tag name* Location of measurement (b) Sales order number Model code Software version Device name* Device type* (a)See Table 12 for expected absolute mV readings. Absolute mV is a very useful sensor troubleshooting tool. (b)Appears only on devices coded 870ITPH-F.
MI 611-211 – October 2005 3. Operation NOTE A change in the Primary Sensor, Resolution, or Scale requires a calibration. Next, under DISPLAY SECOND, you can configure the secondary display to show the absolute value of the measurement in millivolts, the output in 4 to 20 mA, or the temperature. Config Output (Refer to “Structure Diagram 1” on page 38.) This section of the structure first asks you to specify the MODE, referring to the communications and measurement output.
3. Operation MI 611-211 – October 2005 Config Electrod (Refer to “Structure Diagram 2” on page 39.) NOTE This parameter will not appear if ORP was selected as PRIMARY DISPLAY. This section of the structure asks you to specify the electrode: ♦ If measuring pH: Your choices are GLASS, ANTIMONY, or OTHER. GLASS sets the isopotential point at 7 pH. ANTIMONY sets it at 1 pH. OTHER allows the isopotential point to be set manually. ♦ If measuring ISE: You must specify the ion polarity.
MI 611-211 – October 2005 3. Operation For CUSTOM compensation, the temperature values must be entered in increasing order and the slope of the curve cannot change direction. Deviation from this requirement will cause an ER DATA message and force a resequence through the point pairs. Config Temp (Refer to “Structure Diagram 3” on page 40.) This section of the structure asks you to specify the temperature features. First, specify the TEMP UNITS as CELSIUS or FAHRENheit.
3. Operation MI 611-211 – October 2005 Config Damping (Refer to “Structure Diagram 3” on page 40.) This section of the structure asks you to specify the damping response time (90% of step). Choices are 1, 5, 10, 20, 40, and 120 seconds. Damping applies only to measurement data, not to temperature data. Config Chemcomp (Refer to “Structure Diagram 3” on page 40.) If measuring ISE, this section of the structure asks you to specify the chemical compensation (CHEMCOMP) as STANDARD or CUSTOM.
MI 611-211 – October 2005 3. Operation INSTRMNT STAB IND When performing a calibration, the transmitter checks for stability in absolute measurement and temperature before accepting a change. This section enables you to configure the TIME allowed to attain stability and the amount of fluctuation (VAR) allowed. The value of VAR corresponds to the least significant digit of the measurement in the PRIMARY DISPLAY you configured in “Config Display” on page 17.
3. Operation MI 611-211 – October 2005 have a default of 0.0. The values (VALx) can be specified from -2.00 to +16.00 pH and have a default of 0.00. If the average pH values of two special buffers are less than 1 pH unit apart, using this procedure might result in the wrong buffer being selected. In this case, the buffer selection is based on the midpoint between the two buffers. It is not necessary to configure all three special buffers. If only two are used, they should be Buffers 1 and 2.
MI 611-211 – October 2005 3. Operation Table 8. NIST Buffer Tables (Continued) Temperature °C 4.01 pH 6.86 pH 9.18 pH pH Value pH Value pH Value 15 20 25 30 35 40 45 50 4.00 4.00 4.01 4.02 4.03 4.04 4.05 4.06 6.90 6.88 6.86 6.85 6.84 6.84 6.83 6.83 9.28 9.23 9.18 9.14 9.10 9.07 9.04 9.01 NOTE Values in Table 8 are based on NIST Primary Buffer Systems. pH values are at 25°C. Chemical formulas are as follows: 4.01 pH: 0.05 molar Potassium Hydrogen Phthalate 6.86 pH: 0.
3. Operation MI 611-211 – October 2005 Table 9. European Buffer Tables Temperature °C 0 5 10 15 20 25 30 35 40 45 50 55 60 70 80 90 95 4.61 pH 7.00 pH 9.21 pH pH Value pH Value pH Value 7.12 7.09 7.06 7.04 7.02 7.00 6.99 6.98 6.97 6.97 6.97 6.97 6.98 7.00 7.04 7.09 7.12 9.52 9.45 9.38 9.32 9.26 9.21 9.16 9.11 9.07 9.03 8.99 8.96 8.93 8.88 8.83 8.79 8.77 4.64 4.62 4.61 4.61 4.61 4.62 4.63 4.64 4.66 4.67 4.69 4.
MI 611-211 – October 2005 3. Operation same. The default passcodes are both 0800. To disable the passcode feature configure a passcode as 0000. Config Strings (Refer to “Structure Diagram 5” on page 42.) This section of the structure asks you to specify the designation of the Tag Number (TAG NUM), Tag Name (TAG NAME), Location (LOCATE), and Device Name (DEV NAME).
3. Operation MI 611-211 – October 2005 following individually: GLASS, LEAKAGE, LOWSLOPE, PREAMP, ATCSHORT, ATC OPEN, COAT, AGING, 4-20 RNG, COMP RNG, and MEAS RNG. Each of these is discussed below. A typical approach is to initially select ENABLE ALLDIAGS and to DISABLE select messages later when you find out that you do not require them. Further, when you have messages on your display, you may CLEAR all of the messages or CLEAR specific messages.
MI 611-211 – October 2005 3. Operation The message may be enabled, disabled, or cleared. The following Foxboro sensors contain a preamplifier: 871A-4, 871PH-3, 871PH-4, PH10-.P and ORP10-.P. ATCSHORT, ATC OPEN This message reports a problem if the resistance of the temperature compensator is greater or less than the expected resistance of the device configured. The message for each may be enabled, disabled, or cleared. COAT This message reports an increase in reference junction resistance.
3. Operation MI 611-211 – October 2005 Table 11. Sensor Diagnostics Diagnostic(a) Sensor Glass Leakage Lowslope Preamp Coat Aging ATC PH10 ORP10 871PH-1 871PH-2 871PH-3 871PH-4 871PH-5 871PH-6 871A-1 871A-2 871A-3 871A-4 EP460-.N EP460-.P EP462 EP466 X X X X X X X X (b) X (b) X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X (a)X = applicable; blank = not applicable (b)For PH10-.
MI 611-211 – October 2005 3. Operation If you selected MANUAL and your transmitter was specified with digital communications (870ITPH-F), and you had previously selected ANALOG under CONFIG OUTPUT, your display will read MANUAL ANALOG. 1. Specify the value between 4.00 and 20.00 mA at which you want to hold the output while in the Hold mode. The default value is 4.00. 2.
3. Operation MI 611-211 – October 2005 Measurement (normal) mode. If you enter the correct passcode, the display will read CAL MANUAL. If you need to adjust the temperature per the note above, go to CAL TEMP in the structure and enter the correct value. Then go back to either CAL MANUAL or to CAL AUTO. If you are measuring ORP, instead of a MANUAL SINGLEPT calibration, you can use a MANUAL ABSOLUTE calibration. This is an internal calibration that rids the transmitter of nonapplicable calibration data.
MI 611-211 – October 2005 3. Operation and selects the first one for which this pH is within 0.5 pH of the average pH for the buffer. If this pH is not within 0.5 pH unit of any buffer table, a CAL ERROR message is displayed and no buffer is selected. To perform an automatic calibration: 1. Press ENTER at the prompt CAL AUTO. 2. At the prompt IMMERSE IN BUF 1, immerse your sensor in the first buffer solution and press ENTER after you have done so. 3.
3. Operation MI 611-211 – October 2005 5. Adjust the millivolt supply to your first value as determined by the formula in Table 12 and press ENTER. Wait for the display READING XXXXXXXX to alternate with the message ENTER TO EDIT and then press ENTER again. Table 12. Millivolt Supply Formulas Measurement Mode mV Power Supply Formula Glass pH (pH-7)x (-59.16) Antimony pH (pH-1)x (-55) ORP ISE (mV) -59 x log (expected Fin ppm) + 118 mV Examples pH0: (0-7) x (-59.16) = +414.1 mV pH14: (14-7) x (-59.
MI 611-211 – October 2005 34 3.
4. Maintenance ! WARNING This product contains components that have critical safety characteristics. Do not substitute components. Replace components only with identical factory supplied components. Component substitution may impair the electrical safety of this equipment and its suitability for use in hazardous locations. The maintenance of the 870IT Transmitter is limited to replacement of the keypad, the core printed wiring assembly (PWA), and the sensor PWA.
MI 611-211 – October 2005 36 4.
Appendix A.
MI 611-211 – October 2005 Appendix A. Structure Diagrams Structure Diagram 1 CONFIGURATION If PASSCODE MAJOR ≠ 0000 PASSCODE CONFIG DISPLAY DISPLAY PRIMARY PRIMARY SENSOR SENSOR pH ISE ORP If pH PRIMARY RESOLUTN RESOLUTN 0.1 pH 0.01 pH If ISE PRIMARY SCALE SCALE 9.999 ppm 99.99 ppm 999.9 ppm 9999.
Appendix A. Structure Diagrams MI 611-211 – October 2005 Structure Diagram 2 CONFIGURATION (cont.
MI 611-211 – October 2005 Appendix A. Structure Diagrams Structure Diagram 3 CONFIGURATION (cont.
Appendix A. Structure Diagrams MI 611-211 – October 2005 Structure Diagram 4 CONFIGURATION (cont.
MI 611-211 – October 2005 Appendix A. Structure Diagrams Structure Diagram 5 CONFIGURATION (cont.
Appendix A. Structure Diagrams MI 611-211 – October 2005 Structure Diagram 6 CONFIGURATION (cont.
MI 611-211 – October 2005 Appendix A.
Appendix A.
MI 611-211 – October 2005 Appendix A. Structure Diagrams Structure Diagram 9 CALIBRATION If PASSCODE MINOR ≠ 0000 PASSCODE If pH CAL MANUAL MANUAL SINGLEPT MANUAL TWO PT IMMERSE IN SOL If error during calibration IMMERSE IN SOL 1 READING XXXXXXX IMMERSE IN SOL 2 CAL ERROR IMMERSE IN BUF 1 ENTER TO EDIT CAL ERROR CAL ERROR CAL AUTO READING XXXXXXX READING xx.
Appendix A. Structure Diagrams MI 611-211 – October 2005 Structure Diagram 10 CALIBRATION (cont.
MI 611-211 – October 2005 Appendix A.
Appendix B. Configuration Table This appendix contains information that will help you configure your transmitter. The information is presented in the form of a table containing each prompt/parameter, its limits, and its factory default value. It also provides space for you to record your specific configuration and notations. Identifies the structure diagram that contains a specific prompt/parameter. Limits of each parameter.
MI 611-211 – October 2005 Structure Diagram 1 2 50 Prompt/Parameter MIN MAX OUTPUT FAIL SIG FAIL SIG DC mA Appendix B. Configuration Table Parameter Limits Factory Configuration Depends on Analog 0 pH Output 14 pH --OFF, ON, PULSE OFF 3.8 and 20.5 mA 3.8 CONFIG ELECTROD - - GLASS, ELECTROD ANTIMONY, OTHER POSITIVE, NEGATIVE CONFIG TEMPCOMP TEMPCOMP STANDARD, AMMONIA, CUSTOM (CUSTOM) --REF TEMP -99.9 and 999.9 NUM PTS 02 and 21 TEMPx -99.9 and 999.9 VALx -2.00 and +14.
Appendix B. Configuration Table Structure Diagram 3 Prompt/Parameter CONFIG TEMP TEMP UNITS UNITS TEMP MODE MODE DEFAULT MANUAL TEMP TYPE TYPE RTD 2 WIRE 3 WIRE CONFIG DAMPING DAMPING CONFIG CHEMCOMP CHEMCOMP 4 MI 611-211 – October 2005 Parameter Limits ----CELSIUS, FAHREN --AUTO, MANUAL -99.9 and 999.9 -99.9 and 999.
MI 611-211 – October 2005 Structure Diagram 4 52 Appendix B.
Appendix B. Configuration Table Structure Diagram 5 Parameter Limits Prompt/Parameter CONFIG BUFFERS BUFFERS SPECIAL BUFFER 1 NUM PTS TEMPx VALx SPECIAL BUFFER 2 NUM PTS TEMPx VALx SPECIAL BUFFER 3 NUM PTS TEMPx VALx 6 MI 611-211 – October 2005 CONFIG PASSCODE PASSCODE MINOR MINOR PASSCODE MAJOR MAJOR CONFIG STRINGS STRINGS TAG NUM TAG NUM STRINGS TAG NAME TAG NAME STRINGS LOCATE LOCATE STRINGS DEV NAME DEV NAME CONFIG AC PWR AC PWR CONFIG DIAGS --AMERICAN, NIST, EUROPEAN, SPECIAL --02 AND 11 -99.
MI 611-211 – October 2005 Structure Diagram 6 Prompt/Parameter ALLDIAGS GLASS LIMIT CUTOFF T LEAKAGE LOWSLOPE LIMIT PREAMP ATCSHORT ATC OPEN COAT LIMIT AGING 4 - 20 RNG COMP RNG MEAS RNG 54 Appendix B. Configuration Table Parameter Limits Factory Configuration CLEAR, ENABLE, DISABLE DISABLE CLEAR, ENABLE, DISABLE, LIMIT, CUTOFF T 0 - 1100 kOHM 0.0 and 100.0 CLEAR, ENABLE, DISABLE CLEAR, ENABLE, DISABLE, LIMIT 0.0 and 100.0 80.
Index A Ambient Temperature 4 Automatic Calibration 31 C Changing Data 13 Configuration Table 49 Controls and Indicators 11 E Error Messages 12 H Hold 29 I Identification 6 Installation 7 L Load Limitations 4 M Maintenance 35 Manual Calibration 31 Measure 14 Mounting 7 O Operation 11 P Panel Mounting 7 Passcode Access 13 Pipe Mounting 8 Power Supply Requirements 4 55
MI 611-211 – October 2005 Q Quick Start Index 1 R Reference 3 S Sensors 4 Status 16 Structure Diagrams 37 Surface Mounting 7 U Unpacking 7 W Wiring 8 ISSUE DATES JUN 1995 OCT 1996 JUN 1999 JUL 2004 OCT 2005 Vertical lines to right of text or illustrations indicate areas changed at last issue date. 33 Commercial Street Foxboro, MA 02035-2099 United States of America http://www.foxboro.com Inside U.S.: 1-866-746-6477 Outside U.S.: 1-508-549-2424 or contact your local Foxboro Representative.
